<template lang="">
    <header class="header">
        <!-- 头部的第一行 -->
        <div class="top">
            <div class="container">
                <div class="loginList">
                    <p>尚品汇欢迎您！</p>
                    <!-- 没有用户名：未登录 -->
                    <p v-if="!userName">
                        <span>请</span>
                        <router-link to='/login'>登录</router-link>
                        <router-link to='/register' class="register">免费注册</router-link>
                    </p>
                    <!-- 有用户名：登录了 -->
                    <p v-else>
                      <a>{{userName}}</a>
                      <a class="register" @click='logout'>退出登录</a>
                    </p>
                </div>
                <div class="typeList">
                    <router-link to='/center/myorder'>我的订单</router-link>
                    <router-link to='/shopcart'>我的购物车</router-link>
                    <router-link to='/center'>我的尚品汇</router-link>
                    <a href="###">尚品汇会员</a>
                    <a href="###">企业采购</a>
                    <a href="###">关注尚品汇</a>
                    <a href="###">合作招商</a>
                    <a href="###">商家后台</a>
                </div>
            </div>
        </div>
        <!--头部第二行 搜索区域-->
        <div class="bottom">
            <h1 class="logoArea">
                <router-link class="logo"  to="/home">
                    <img src="./images/logo.png" alt="">
                </router-link>
            </h1>
            <div class="searchArea">
                <form class="searchForm">
                    <input type="text" id="autocomplete" class="input-error input-xxlarge" v-model="keyword" @keyup.enter='goSearch'/>
                    <button class="sui-btn btn-xlarge btn-danger" type="button" @click='goSearch'>
                      搜索
                    </button>
                </form>
            </div>
        </div>
    </header>
</template>
<script>
export default {
  name: "Header",
  data() {
    return {
      keyword: "",
    };
  },
  methods: {
    //搜索按钮的回调函数，需要向search路由进行跳转
    goSearch() {
      //路由传递参数
      //第一种：字符串形式
      // this.$router.push(
      //   "/search/" + this.keyword + "?k=" + this.keyword.toUpperCase()
      // );
      //第二种：模板字符串
      // this.$router.push(
      //   `/search/${this.keyword}?k=${this.keyword.toUpperCase()}`
      // );
      //第三种：对象的写法
      // this.$router.push({
      //   name: "search",
      //   params: { keyword: this.keyword || undefined },
      // });
      let location = {
        name: "search",
        params: { keyword: this.keyword || undefined },
      };
      if (this.$route.query) {
        location.query = this.$route.query;
      }
      this.$router.push(location);
    },
    //退出登录
    async logout() {
      //1.发请求：通知服务器退出登录 【删除数据】
      //2.清除项目中的数据【userInfo,token】
      try {
        await this.$store.dispatch('userLogout')
        //退出成功则回到首页
        this.$router.push('/home')
      } catch (error) {
        alert(error.message)
      }
    }
  },
  mounted() {
    //通过全局时间总线清除关键字
    this.$bus.$on("clear", () => {
      this.keyword = "";
    });
  },
  computed: {
    //用户名信息
    userName() {
      return this.$store.state.user.userInfo.name
    }
  }
};
</script>
<style scoped lang='less'>
.header {
  & > .top {
    background-color: #eaeaea;
    height: 30px;
    line-height: 30px;

    .container {
      width: 1200px;
      margin: 0 auto;
      overflow: hidden;

      .loginList {
        float: left;

        p {
          float: left;
          margin-right: 10px;

          .register {
            border-left: 1px solid #b3aeae;
            padding: 0 5px;
            margin-left: 5px;
          }
        }
      }

      .typeList {
        float: right;

        a {
          padding: 0 10px;

          & + a {
            border-left: 1px solid #b3aeae;
          }
        }
      }
    }
  }

  & > .bottom {
    width: 1200px;
    margin: 0 auto;
    overflow: hidden;

    .logoArea {
      float: left;

      .logo {
        img {
          width: 175px;
          margin: 25px 45px;
        }
      }
    }

    .searchArea {
      float: right;
      margin-top: 35px;

      .searchForm {
        overflow: hidden;

        input {
          box-sizing: border-box;
          width: 490px;
          height: 32px;
          padding: 0px 4px;
          border: 2px solid #ea4a36;
          float: left;

          &:focus {
            outline: none;
          }
        }

        button {
          height: 32px;
          width: 68px;
          background-color: #ea4a36;
          border: none;
          color: #fff;
          float: left;
          cursor: pointer;

          &:focus {
            outline: none;
          }
        }
      }
    }
  }
}
</style>